that if it got in here, you know, i'm afraid that would be it. >> reporter: more help continues to arrive, but it's one tough battle, and no one knows how long the fight will take before the flames subside. >> reporter: well, we've been talking about mandatory evacuations and the possibility of that. that started happening around thursday afternoon. police going to some residents and asking them to leave, very emotional, of course, peek are leaving not knowing if they are house will be standing when they come back. a few structures were destroyed on the opening day of the fire on saturday, but in the last couple of days no structures have been destroyed. the firefighters working very hard to protect these homes. >> all right, melissa chan, thank you. san diego's embattled mayor bob filner could step down today. he has reportedly agreed to resign in order to settle a sexual harassment lawsuit.